TkTable is a table/matrix widget extension to Tcl/Tk.
The basic features of the widget are:

 * Multi-line cells
 * Support for embedded windows (one per cell)
 * Row & column spanning
 * Variable width columns / height rows (interactively resizable)
 * Row and column titles
 * Multiple data sources ((Tcl array || Tcl command) &| internal caching)
 * Supports standard Tk reliefs, fonts, colors, etc.
 * X/y scrollbar support
 * Tag styles per row, column or cell to change visual appearance
 * In-cell editing - returns value back to data source
 * Support for disabled (read-only) tables or cells (via tags)
 * Multiple selection modes, with "active" cell
 * Multiple drawing modes to get optimal performance for larger tables
 * Optional "flashes" when things update
 * Cell validation support
 * Unicode support
